Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c035cf27792b222…

MALICIOUS

PDF

82.2 KB Created: 2021-09-18 11:50:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 8d170cbed96c0a5c2194dff7f28383d6 SHA-1: 4ad08dd83e7d51142a871fc3bbf732cb4119ca0f SHA-256: 3c035cf27792b22258a264fe2d96f31940f8a734346752ffe37e93c41f88666d
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicate a high probability of maliciousness. It contains numerous external URIs, many pointing to compromised WordPress upload directories or disposable hosting, suggesting a link farm designed to distribute malware. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://irlanc.ru/uplcv?utm_term=idm+internet+download+manager+full+crack PDF link annotation
    • https://cbdc.co/uploads/ckfinder/userfiles/files/jaronuxivebameji.pdfIn PDF document text
    • https://pelicanfinancialnetwork.com/ckfinder/userfiles/files/zigol.pdfIn PDF document text
    • https://casabresciani.it/uploads/file/nudenavuwoneze.pdfIn PDF document text
    • http://hotelalbicia.com/userfiles/file/35326250961.pdfIn PDF document text
    • http://sasnowosielski.com/ckfinder/userfiles/files/mesasojidufisebojomekotez.pdfIn PDF document text
    • http://studiosiciliani.eu/userfiles/files/20694651348.pdfIn PDF document text
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/vp8292lhv6gic3pf6cc1mf55lu/gevadazefa.pdfIn PDF document text
    • http://gadkowski.pl/repository/filemanager/file/rejivava.pdfIn PDF document text
    • https://nghiepvu.udicmanpower.vn/uploads/news_file/feluziwipilisavagejora.pdfIn PDF document text
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/bd621c4e2d3fb7cbbcfc49d123418e4e/vururomegizefomebimaxaxo.pdfIn PDF document text
    • http://santeh.md/img/files/bokesobulod.pdfIn PDF document text
    • http://ngocphuocjsc.com/public/default/ckeditor/files/xovemikonevofozu.pdfIn PDF document text
    • http://choinka4x4.org/cms/files/file/26382267215.pdfIn PDF document text
    • https://mamadona.ru/ckfinder/userfiles/files/95443212721.pdfIn PDF document text
    • http://technology-mp.it/userfiles/files/jisanobapogan.pdfIn PDF document text
    • http://gsprojekt.eu/userfiles/files/21241119318.pdfIn PDF document text
    • http://140.121.125.49/ckfinder/userfiles/files/20210906_205551.pdfPDF link annotation
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/161389f1f2a7aa---gaxofo.pdfIn PDF document text
    • http://imobiliariaimperio.com/files/files/dibekurujosexepogu.pdfIn PDF document text
    • http://blueleaves.ru/userfiles/file/gobudonufizomatakoz.pdfIn PDF document text
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/16144f52461545---25599136301.pdfIn PDF document text
    • https://euroialinsol.ro/userfiles/file/kisutebibawezal.pdfIn PDF document text
    • https://edouardweil.com/userfiles/file/83492105885.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d3a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3A8 20784 bytes
SHA-256: 644ed230c4230e6e73b47fda4c6fb06cb505c3a1302831cc543fc59807fd8ac6
font_01_sfnt_off00010a45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A45 10880 bytes
SHA-256: 9aaed03633182d63a8bf57fe6eec56c2decf75fad2925daabfe5edbb51633877
font_02_sfnt_off0001233d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1233D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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